The antonyms for the word "gotten well" are numerous, as there are several terms that can be used depending on the context. If referring to physical health, antonyms could include "sick," "unhealthy," "ailing," or "ailing." Alternatively, if referring to the success of a project or plan, antonyms could include "failing," "unsuccessful," "ineffective," or "inefficient." In other contexts, antonyms for "gotten well" may vary widely, depending on the intended meaning. Regardless of the context, however, the antonyms of "gotten well" often serve to emphasize the negative or unsuccessful aspects of a situation or experience.